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FEM Analysis of Spring-backs in Age Forming of Aluminum Alloy Plates

机译:铝合金板时效回弹的有限元分析

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The age forming technology, characterized by huge spring-backs, has been developed to manufacture large integral wing-skin panel parts, which necessitates devising a method of predicting spring-backs. A 7B04-T7451 aluminum alloy creep test in tension is accomplished at 155 ℃, and the creep curves are obtained. The material constants of the mechanism-based creep constitutive equations are determined through experiments. The age forming process and the spring-backs of 7B04 aluminum alloy plates are analyzed using the commercial finite element software ABAQUS. The effects of plate thickness and forming time on spring-backs are researched. The spring-backs decrease with the increase of plate thickness and forming time. The test results verify the reliability of the finite element method (FEM) analysis.
机译:已经开发出以大回弹为特征的时效成型技术,以制造大型整体机翼蒙皮镶板零件,因此有必要设计一种预测回弹的方法。在155℃下进行了7B04-T7451铝合金的蠕变试验,获得了蠕变曲线。通过实验确定了基于机构的蠕变本构方程的材料常数。使用商业有限元软件ABAQUS分析了7B04铝合金板的时效形成过程和回弹。研究了板厚和成形时间对回弹的影响。回弹随着板厚和成形时间的增加而减小。测试结果验证了有限元方法(FEM)分析的可靠性。

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